Smoking pipe



Jan; 13, 1942. A. M DONALD SMOKING PIPE Filed May 31, 1940 INVENTOR 4R0! IVAC DO/YHLD BY m ATTORNEY Patented Jan. 13, 1942 UNITED STATES PATENT OFFICE.

3 Claims.

This invention relates to tobacco smoking pipes, and has for its principal object to provide improvements in pipes that will overcome undesirable heating of the bowl and stem and will resuit in a cooler smoke than is usually obtained from use of pipes of this type.

It is also an object of this invention to overcome heating of the pipe bowl by providing it with inner and outer walls, or what I refer to as shells, enclosing an insulating air chamber between them.

Another object of the invention resides in the details of construction and relationship of the various parts of the bowl, to insure against the transmission of heat from the interior to the exterior shell and in the manner and meansfor securing the parts together in assembled relationship and functionally attached to the stem.

Still another object of this invention resides in the provision of a stem of novel construction, provided with a relatively large chamber in which the intaken smoke will be cooled prior to its being drawn out.

It is still another object to provide for easy interchange or replacement of the inner shell of the pipe bowl.

Still further objects of the invention reside in the details of construction of parts embodied in the stem, and in a special clean-out device associated therewith.

Inaccomplishing these, and other objects of the invention, I have provided theimproved details of. construction, the preferred forms of which are illustrated in the accompanyin drawing, wherein- Fig. 1 is a side view of a smoking pipe embodied by the presentinvention.

, Fig. 2is a view of those parts which are embodied in the stem portion of the pipe, showing them in disconnected relationship, and partly in section.

Fig. 3 is a longitudinal, sectional view of the P p Fig. 4 is an enlarg;ed side view .of parts of the clean-out device, shown in disconnected relationship.

Fig. 5 is an enlarged, cross sectional view of the pipe bowl.

Fig. 6 is a view of a pipe bowl of an alternative form.

Referring more in detail to the drawing-- The present pipe is designated in its entirety by reference numeral I, and it comprises a bowl assembly 2 and a stem assembly 3. The bowl assembly includes those parts which are comprised in the outer shell, the inner shell and the devices whereby the parts of the bowl are held assembled and secured to the stem. The stem assembly includes the the stem barrel,-the mouthpiece and the clean-out device.

First, describing the bowl assembly, especially with reference to Fig. 5, in which its structure is best shown: 5 designates the inner shell, which is designed to receive the tobacco. This is of cuplike form, open at the top and closed at the base by a wall 5' which may be of the rounded form shown in Fig. 5, or of the conically tapered form of the shell 5a shown in Fig. 3. In the center of the bottom wall 5' of the bowl is a hole 6 for reception of an attaching screw 1, which will later be described more in detail; and, about its upper periphery, the shell is formed'with an encircling, outwardly projecting flange 8.

The outer shell of the bowl comprises a metal base 9 and an upper member Ill. The member is of truncated-conical form, and is formed about its upper edge, at the inside, with an inwardly facing s'eat ll adapted to receive the base surface of the annular flange 8 of the inner shell thereagainst, so that, when the latter is seated therein, the upper ends of these parts will be flush and a tight connection is provided,

The base section 9 is of disk-like form, preferably of metal, and provided with a central hub or neck I2 with an opening through which a tubular screw I3 is threaded. This screw is both interiorly and exteriorly threaded and has a flanged head, or upper end portion M, which is seated against :the inner surface of the piece. The lower end portion of the screw l3 extends below the base of the piece 9, and, as later will be understood, serves to attach the bowl assembly to thestem assembly.

The upper peripheral edge portion of the base 8 is formed with an upturned flange l5 which seats per edge flange ii of the metal base 9, and the hollow screw IS in place, then all may be secured together by the application of the screw I that.

is extended down through the central hole 6 of the inner shell and is threaded into the hollow or hole 6 to form a tight joint and to clamp the parts tightly together. The screw I, being hollow from end to end, forms a channel for passage of smoke from the bowl into the stem.

To facilitate the application of the hollow screws I and I3, each is formed across its head end with a channel, as at IQ, for reception of a screw driver bit.

with the parts so shaped and assembled, it is to be noted, especially by reference to Figs. 3 and 5, that an air chamber 20 is thus provided between the inner and outer shells. This chamber may be ventilated by the provision of air ports 2| through the base and upper sections 9 and It to facilitate the cooling effect. The insulating effect of the air chamber is apparent.

The stem assembly, as observed best in Figs. 2 and 3, comprises a tubular barrel portion 25 of relatively large inside capacity, open from end to end. Set in the top wall of this barrel, near one end, is a metal collar 26, having a threaded hole for reception of the threaded lower end of the hollow screw l3 to functionally attach the bowl to the stem, and when these parts are assembled, the lower end of the screw is substantially even with the chamber wall. At its bowl mounting end, the barrel is closed by a threaded plug 21 formed with a head 28 that may be knurled to add decorative effect thereto.

The barrel 25 preferably is formed of a plastic material, and is slightly outwardly flared from the bowl end, to mouth-piece end, and at the latter end has a metal sleeve] 30 fitted and cemented therein. This sleeve has an end flange 30' of a decorative character, that limits its extent of seating within thebarrel. A mouthpiece 32 is removably fitted in the sleeve, and this has a channel or here 34 which, at its inner end, mounts a small tube 35 that extends beyond the inner end of the mouthpiece and is provided, as noted in Figs. 2 and 3, with ports 36 for entrance of smoke. 7

Threaded into the end of the tube 35, but not to an extent to obstructlthel ports 16, is a rod 40 that extends axially of the'barrel, as seen in Fig. 3,-and terminates just short of the bowl connection, and i there provided with a metal ball ll, and a disk 42 of a diameter that closes the barrel at that point. The disk is formed with a plurality of small ports 43 for passage of the smoke. In this assembled relationship'of parts,

smoke drawn into the barrel from thehowl .flrst contacts the metal ball and .thisl 'aids in condensing the moisture in the smoke; the smoke then passing through ports 43 into the larger chamber of the barrel and then to the mouth piece channel through the ports 16. The small chamber between the disk 42 and plug 21 re-'- tains the moisture. Y

In Fig. 6 has been structure in which there is a flanged metal collar applied about the upper end of the inner shell 8 and this has a flange SI for seating against the shoulder flange 8, and has a downturned flange 52 overlapping the upper end of the section Hi. This collar may be more desirable in some instances, due to its ornamental quality.

Since it is intended that pipes of this character be made up in plastic, it is possible to make them in many different design and in many combinations of attractive colors. Furthermore, the fact that the inner shell is easily removable or replaceable, makes it practical to form these shells of a material that adds to smoking comfort, such, for example, as corn cob, which is inexpensive and very desirable from the standpoint of the smoker.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is:

1. In a. pipe of the character described, a bowl comprising an inner shell formed with a bottom wall opening, an outer shell spaced from the inner shell with respect to the major portion thereof and providing an intermediate air chamber between them and having a bottom wall opening, and a hollow screw extended through said openings of the inner and outer shells for mounting the bowl on a stem and having a head engaging in clamping contact with the inner shell about the bottom opening therein to hold the parts functionally assembled.

2. In a pipe of the character described, a stem having a smoke chamber therein and a mouthpiece applied to the stem for drawing smoke from the chamber, and a bowl assembly comprising an outer shell, an inner shell applied within the outer shell to provide an intermediate air chamber; said inner and outer shells having shown an alternative bowl registering openings in their bottom walls and a hollow screw extended through said openings and threaded into the stem to mount the bowl on the stem and to form a smoke channelfrom the bowl into the stem. f 3. In a pipe of the character described, a pipe stem having a smoke chamber, and'having a top opening into one end of the chamber, abowl comprising an outer shell and an inner shell forming an intermediate air chamber; said outer shell comprising a base member with a central I opening and a top member mounted on thejb'ase member, a hollow screw extended through the said central opening of the base member and threaded into said stem opening to attach the base member to the stem; said inner shell having a holding connection about its topedge with the top section of the outer shell and having a base opening, and "a' hollow screw extended through saidbase opening and threaded into the first mentioned screw to secure the two shells functionally together, and providing a smoke passage from the bowl into the stem.

ARCH MACDONALD. 

